How to Write an Informal Letter for a General Exam

"We're having some weird weather swings here in the U.S." "I'm not in the mood this year, but I am excited because it's the day after tomorrow" 'How could people not believe in climate change? Just like, look outside' "'What about words and phrases like stuff and guess what and whatsoever?' How would you answer that from your understanding?" ''And then to get that, like, seven marker, right, for vocabulary, you need to use informal phrases?'"